Process of conserving and repairing chimneys



F. F. BEEBY PROCESS OF CONSERVING AND REPAIRING CHIMNEYS Filed Nov. 24

1919 2 Sheets-Sheet 1 [72 V6 Mia)". Wm 72%. 2 3% by W Oct 2 F. F. BEEBY PROCESS OF CONSERVING AND REPAIRING CHIMNEYS F iled Nov. 24. 1919 2 Sheets-Sheet 2 which the cement hardens.

Patented Oct. 2, 1923.

FRANK F. BEEBY, OF CHICAGO, ILLINOIS, ASSIGNOR TO CEMENT-GUN CONSTRUCTION COMPANY, OF CHICAGO; ILLINOIS, A CORPORATION OF ILLINOIS.

PROCESS OF CONSERVING AND REPAIRING CHIMNEYS.

Application filed Nbvember 24, 1919. Serial No. 340,315.

To all whom it may concern:

Be it known that L'FRAN F. BEEBY, a citizen of the United States, residing at Chicage, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in a Process of Conserving and Repairing Chimneys, of which the following is a specification. I My invention relates-to a process of conserving and repairing chimneys, and more particularly to concrete chimne s built about steel stacks alreadyin place. y chimney is particularly adapted to be constructed by the projection of the type of concrete called gunite against the outer surface of the chimney, which surface acts as a base against Further purposes will appear from time to time in the course of the specifications.

I illustrate my invention more or less diagrammatically in the following figures wherein:

Figure 1 is an elevation of my chimney with parts broken away;

Figure 2 is a plan view of the anchorage of my chimney;

Figure 3 "is a section on the lines 3-3 of Fi 1;

igure 4 is a section on the lines 44 of Fig. 1;

Like parts are represented by like symbols in all of the figures. A is any suitable base or supporting structure to whlch a steel chimney A is attached. A are anchor bolts, fixed in the base A and securing with the nuts A", the members A the enlarged base of the steel chimney, to its foundation. I employ this structure as an anchorage for my concrete chimney rein- 40 forcement. A are angle irons or any other suitable structural members secured to the members A by the bolts A? and nuts A and A are channel irons suitably secured to A, and extendi vertical rein orcing bars which forced concrete structures. B is reinforc-v ing netting or mesh disposed in one or more which anchor ,which can be removed from an about the chimney. B are may behooked about and wired to the irons A, or,

layers throughout the chimney structure. C

'is the gunite or concrete in which the reinforcement is imbedded.

My method of'const'ruction is as follows:

I build my concrete chimnev about a steel stack which is weakening or. leaking, or for any other reason, needs strengthening or replacement. The steel stack serves as centering for the reinforcement, and acts as the bgse or mold against which the concrete is s ot.

Steel stacks are firmly anchored to their foundations by anchor bolts imbedded in the masonry or concrete, which clamp the base of the chimney in place. I use'these anchor bolts as the anchorage for my reinforcing structure. In the drawings, I illustrate a specific form of anchorage, but it will differ from stack to stack, and my invention is in no sense limited to the details of anchorage and reinforcement shown. In the ,illustrated' form I secure channel irons to the anchor bolts, and use them as the anchorage of the concrete stack.

The reinforcement is the combination usual in the art of vertical rods, horizontal rods or hoops,wired to the verticals, and wire or expanded metal mesh. 'The vertical rods may be grounded on the foundation as in the illustrated form, or may be hooked about, or otherwise firmly secured to the structural members about the base of the stack. If the length of the bar below the channelstructural member is considerable, it will be sufiiciently anchored by the concrete to obviate the necessity of looping or hooking it about the member. The reinforcing structure is spaced from the stack by any suitable means, such as wooden blocks one point before it is reached by the level 0 the gunite. The reinforcing structure will thus be entirely out of contact with the stack, and cannot be attacked or rusted by gases or weather.

When the reinforcement is in position,

-the stack may be shot by the well known gunite process, which consists in the projection against the stack of a thin cement, commonly called gunite, shot from a pressure nozzle manuall manipulated.

If necessary, the t ick portion of the concrete, about the base of the stack, may be poured into a mold. I prefer to construct the rest of the'stack by projecting gunite against the-steel stack until the reinforcement is covered to the desired thickness.

I build a scafiolding about the stack, but out of contact with it. In practice two gangs will work from the scaffolding, one, highest up, placing the reinforcing structure, and cementing it as, for example, with wooden blocks, and another, below manipulating the cement guns or nozzles. As the level of the cement rises the wooden centering is removed. There is of course no fixed relation between the crews, and the whole structure might be put in place before the cement gunning begins. In practice the cement projection will generally follow fairly closely the construction of the reinforcement.

When the cement is all in place, and has hardened, the function of the steel stack ceases. It is surrounded by reinforced concrete stack, which will not be afiected by the progessive disintegration of the steel stack.

I claim: v

1. The process of constructing about a chimney already in place a second chimney which consists in placing reinforcing about such first chimney, spacing the same from such chimney, mounting such reinforcing upon a foundation at the base of such chimney anchoring said reinforcement to said foundation and placing upon and about such reinforcing and about such first chimney concrete to form such second chimney.

2. The process of constructing about a chimney already in place a second chimney which consists in placing reinforcing about such first chimney, spacing the same from such chimney, mounting such reinforcing upon a foundation at the base of such chimney and placing upon and about such reinforcing and about such first chimney concrete to form such second chimney.

3. The process of forming a substitute chimney about an existing chimney, which consists in erecting a reinforcement about said chimney, inserting spacing members between said reinforcement and said existing chimney, applying concrete about said chimney and said reinforcement to the posiremoving said concrete to tion of the spacing members, spacing members and applying the next higher portion.

In testimony whereof, I afiix my signature in the presence of two witnesses this 19th day of Novemeber 1919.

FRANK F. BEEBY.

Witnesses:

Anrrrnn E. JOHNSON, JOHN V. SoHAnrnR. 

